Jos Hooiveld has urged Celtic's fans to will them on to an unlikely comeback against Braga in Wednesday's crucial Champions League qualifier at Parkhead.
A shoddy defensive performance in Portugal last week left the Bhoys' hopes of staying in Europe's premier club competition hanging by a thread.
Three sloppy goals allowed Braga to take a 3-0 lead into the second leg of the third-qualifying-round tie in Glasgow.
His team may have a mountain to climb to reach the play-off round, but Dutch defender but Hooiveld is confident the visitors will wilt under the pressure of playing in front of a packed house at Parkhead.
"I hope it will be an atmosphere with 60,000 crazy Celtic fans screaming at them on Wednesday," said Hooiveld, speaking after Celtic's 3-2 defeat by Arsenal in the Emirates Cup on Sunday. "I think they aren't used to that kind of atmosphere.
"If you look at their attendance for the first leg then it was much smaller than what it will be on Wednesday and I think we can `put the fire at their shins', as we say in Holland. They could be our 12th, 13th and 14th man for sure."